Trochamminoides subcoronatus ( Grzybowski, 1896 )

Benedetti, A, 2017, Eocene / Oligocene deep-water agglutinated foraminifers (DWAF) assemblages from the Madonie Mountains (Sicily, Southern Italy), Palaeontologia Electronica 20 (1), pp. 1-66 : 35

Trochamminoides subcoronatus ( Grzybowski, 1896)

Figure 17.6

1896 Trochammina subcoronata ; Grzybowski, p. 283, 284, pl. 9, fig. 3a-c.

1996 Trochamminoides subcoronatus (Grzybowski) ; Kuhnt and Collins, p. 214.

2001 Trochamminoides subcoronatus (Grzybowski) ; Kuhnt and Urquhart, p 56, pl. 3, fig. 9 (cum syn.).

Material. 16 specimens from nine samples.

Description. Test free, very large, subelliptic or circular in outline, planispirally coiled with 6–8 elongated sack-shaped chambers in the last whorl.

Remarks. Trochamminoides coronatus has a higher number of chambers.

Figures

FIGURE 17. Scanning electron micrographs of Lituotubidae (1-3, 7, 9, 11-12) and Trochamminoidae (4-6, 8, 10) from the Caltavuturo Formation cropping out at Portella Colla. 1-2, Paratrochamminoides heteromorphus (Grzybowski, 1898), MM12 (1) and MM14 (2). 3, Conglophragmium irregulare (White, 1928), PCs0. 4, Trochamminoides coronatus (Brady, 1879), MM14. 5, Trochamminoides grzybowskii Kaminski and Geroch, 1992, MM1. 6, Trochamminoides subcoronatus (Grzybowski, 1896), MM1. 7, Paratrochamminoides cf. olszewskii (Grzybowski, 1898), PC060615. 8, Trochamminoides dubius (Grzybowski, 1901), PC060611. 9, Paratrochamminoides olszewskii (Grzybowski, 1898), PC11. 10, Trochamminoides dubius (Grzybowski, 1901), PC060611. 11, Paratrochamminoides aff. olszewskii (Grzybowski, 1898), PC060615. 12, Paratrochamminoides aff. gorayskii (Grzybowski, 1898), PC060615. Scale bars equal 0.5 mm.